Method or art of making plates for printing safety tints



June 5,1923.

' D. E. WOODHULL METHO D OR ART OF MAKING PLATES FOR PRINTING SAFETY TINTS Filed July 15 1921 2 Sheets-Sheet l W 5] nue 'wlfoz W as flab 014019 M Patented J une 5,

I ma'rndn nnror'nanmermrus r -ninrlneisarurr ems, if]

; n iihati 'meaq i seria vno;435,032; l

To ictll wkomlit hiaLy :Be it known that 1. DAN,

vented :cert ain ,new andus'eful 1m rote merits in the-Method or ArtofMaking' h lates for-@Printin'g Safety :Tints, of-j Which the 1? following" is, a specification; reference being had therein to the accompanying drawings,"

Which form a part thereof.

Myinvention relates, to ,t,he method or are of making plates forfprinting saiety tints,

-and more .particularly toai method or art; practiced partmechanically, .inpart man I ually, ,in'part photographically and n, part chemically.

vention consisted in combining different portion of a a Q geometrical or scroll line design produced by means"v of rose. engine or pantograph,- and reproducing the design-thus rm d by. rd n ry B W-e g v li t ods soas to produce eitheracameO o'r in tag iq ri ti g urf conta ning'th e entiredesign, o'ra plurality of;plates each containing only a portion F thereof, according'to Whether the plateswere mb ll h" a a a .T-int designsare flig'ormed of fine llnes closely juxtaposed, the design being created by the formation of loops or convolutions I v#-:;. crossing and recrossing eaeh other and 5 grouped'about a common center so that not-v withstanding the lines are; all ,of: .the same breadth, different tonal efl'iects are secured in iffs t nt P t of t design by r aso f F5, closerproximity of the line mad] acent loops- 4 and; at, common crossing point of a great nllmberof lines Such,,designsare. solely mechanical in, their origimfand so appear to Workers in theart.)

5' designs. of; character are trie ate and, when .impresseduponhank notes ia 1e instru n s, mp eyla're-t factor, of safety thereto, they may be exactly methods of reproduction heretofore .em-

ployed, it- :has i been found impossible to pro-i ducegpri Damian ooimunn, or unwnonx; N; Y., nssreuon TO AMERICAN Bank not:

1 commnmnoonromrrou orwnnw xonxxiz cult orimpossible. Wheninultic'olorf we k '1 difiiculties of reproducing suchf designs, has been necessa ry- -to useplates wh of multicolor prints has heretofore been pos-' I l I 1 I J throughoutfithe imprint The method of producing plates for m'ak ing safety tints,'jemployed priorto my 1nusing a single plate n multicolor or single color work.

4 thousandths "of an'jinch away reproduced mechanically one skilled in. By reason of thefineness of the line and ting Plates :by'a practical mau d p 1 nary eounterfeiter. v e 'n which the mechanical aspects the vdef F mm rbe m a d? or. modified e1 WOQDHU a citizen of the United. States, residing at the; borough of Manhattan, inthel any; 5 co'untyQandState of New York, 'li'ave 1in? l l i 'rl't k ounterfeiting thereo i'dififif i has beenresorted to in order .to 'fincrease5the.' it i adjacent lines of agroup will be ofth color, the plates used for-one C0101 blank pa s rre pond n ni hfthe a tionsjofjthe plate bearing portions oft linendesignto be inked-in amifiher colon W'hile Widedivergence in the color scheme b1 f m it d lniak g' h ip nti ea plates he'retoforefemploye'd has'p-laced gre limitations as to 1 the distribution oflciol 1T0 securefthe',clesiredetfeet ottheii npri absolute .rgisflj-Iibf the plates for diiterentlf I colors is essential, since. one of therequisite of safety tint Wfork'is a perfection of 6X6 ti'on" hich'Will'make"reproductiomdifileut? ith; the above-"eonditionsin' m indylha devised a method of; producing plates f;

this character whereby the uniformit '-.'@'f v I the thickness ofthelinesof hej'desigrhl q I is et [characteristic of line designs a rose engine or'p'antograph, may be in arbitrarily selected portions of the (1esignsoas' to preclude the reproduction'jof $11 3.. I

design mechanically, Themthbd Ofifijjss 1 t invention alsoi'cQ templates; the eradication] from the plate of other essential characteris tics of 'machine made design and if "nece ssar-y the substitutiontherQfO of. bigm y u s; r i d wh fi re lcri l nQt.

possibly be'mechanic'ally ineorporated mpg;

f The method of. my inyention ris. partials, I I

larly adapted to the making "of plates for multicolor safety-tintswhich will-per e y use of different colors t promiscuous 1y lines distributed throughou. the" eompl tegli n, e n t u h p si oned:oe yle' fe othe colors Wh ch. een 't onean steeme 1. 0 Y

13y t 'i n b p asma we with the method or art of myinvention, all restrictions asto the distribution of the inks of different colors are'avoided, and the color scheme is controlled primarily by .the

plates: In making plates for multicolor tints, closely adjacent lines as they appear in the tint impression may be accurately positioned upon difierent plates, and many of those difficulties incident tothe securing of perfect register may be avoided. A. series of color plates'may thus be made wherein the different colors instead of being in isolated parts of the print may be distributed throughout the print in such close juxtaposition one to the other as to make unauthorized reproduction practically impossible.

The method'of making the plates, permits the strengthening of the line thereof as ,well as arbitrary variations in'thei'r widths,

and the incorporation of arbitrary figures in the design.

The invention consists primarily in the method or art of making plates for printing'safety tints consisting in mechanically creating 'a line geometrical design, photographlcally enlarging said des1gn,mod1fy-- ing the characterlstlcs of some lines in saiddesign, whereby such lines are readily dis- 7 tinguishable from the mechanically produced lines, photographically reducing the modified design, and'making a photo-engraving of the reduced'deslgn; and in such other novel steps and practices as are hereinafter set, forth and described, and more particularly pointed out in the claims hereto appended.

Referring to the drawings,

Fig. 1 is a view'of a fragmentary portion of'a geometrical design to be used in making plates in accordance the method or art of my invention;

Fig. 2 is a photographic enlargement of said portion of the design, I

Fig. 3 is a view thereof, some of the lines being manually modified and others being blocked out,

Figs. 4, 5 and 6 are views similar to Fig.

3 forming therewith a'group of plates for Y multicolor work; and

Figs. 7, 8, 9 and 10 are photo-engraved reproductions of the modified figures shown in Figs. 3, 4;, 5 and 6."

Like letters refer to like parts throughout the several views.

In the practice of the method or 'art of my invention, an original, line, geometrical design is created by means o'fan ordinary rose engine or pantograph so set as to cause 1 the production of this design upon a reduced scale while preserving the proper relativespacing between succeeding loops or convolutlons and unlform width of the continuous line of 'whlch the design is formed.

This design results from the formation of a sequence offconvolu-tions or loops, the lines of succeedingloops being spaced closely together by a relative step-by-step movement of the plate on which a, design is impressed;

and the. working point acting thereon. The

opposite lines of each loop are grouped about a common center so that the portions thereof toward the center cross and re-cross the lines of precedingand succeeding loops of the design may be secured. I

Thetonal effects and the general conportions tour of the design may be varied indefinitely, but such variations are. the results of functionings in the machine and where ever distinct lines appear in the design, they will all be of uniform Width; Such designs are created upon a glass plate surfaced so as to. be impenetrable to light rays, the working point removing this surfacing so as to produce what is the sub-'- stantial equivalent of a photographic negative. Fig. 1 of the drawings represents such a plate, and its scale approximatesthe actual dlmensions of an original design.

From a reference 1 01 Fi 1 i w l noted that the spacing between the lines is very small, and that if portionsof the design be repeated a number of timesin;

building up a completed design of the desired dimensions, and if it be desire to modify or delete or segregate any of these lines, it will be practically impossible, or i very diflicult, to do so,"since it would be necessary to do the work by hand and the fineness of the lines and their close" proximity to each other would inevitably leadto the running together of the lines,

loss of definition in each line, and an uncontrollable variance in the thickness of the lines.

Bythe old methods, the negative-like plate 7 was used as in photo-engraving, to repro duce the design upon a metal plate containmg a reslst'and a sensitized emulsion, which 1'15 plate'after being develope'dis acid-etched" my invention, in order to permit modification in the widthof some of the lines, removal or deletion of some of the lines to vary the tonal eifects and the formation of a plurality of plates each including some only of the lines, as in multi-color work,

which would entail the removal of some ral ity' of rigid metal plaites haviiig ai-n QLf-fr. finity' {for ink; 'The'vdesigh: must he placed i in "exactly the same pos'itiorlrupen "each'ef these metal plates. SuehV lRtesYaIQ-sh Wn'- 1ines' in sonie "late?!" ind theii rtentieh in; other plates; first 1 enlarge the -origihaldesigmby ei'dlihnfy Iphotographie -methorls- ,SlIChas solar '1" bmmideprint'ing; such an;

print u on paper.

s after he'ing properly "developed is used in catedi at Q E, 1E "arid' F- re'speetiyely,

where the. subject may be increasefcl't {tent-i fold in s'ize,' theie {is a loss" of gdefinitipnih the reprpduction and .any imper' fe'ctihns'me greatly 'ez'leggeretedlf Hence *i hfth print B aim the photbgraphic' 'reprodtictibn there plfifalityof plates. is need? when multi= 00101 "Work is to he done therewith, ekbt itude in theplaeing ot the :le'sign being he'c ess'ery "si nc'e' whenthe design hasfbeven eO-m pletely prqcln'ce'l the pertions of the de sign appearing.- on each *plet'e must exactly registerwith the portions of the design 1 u'pon' each of the otherflplatie's s'o'that the implies t flom' thep-rint-mg' plates made'there -f 5 frdr'nfithe'r simultaneously-01" suec'essi vely will exactly reproduce the .completeddesigh, ahd such fn-led-i fietttions ji-nedi pbi'ated. therein as mdi-eipeiiiefllaxly'Ere The rigidity bf; the metal plates "will" ofu on the piatesqje,aye-ema l? 11 perfections end -igrfl 'egu lawit'ies the lines ofthedesign will be" c1ea 1fly-apparent s-mce greaterfand ihstead'qf being spaced ziparta few hufiflwedths- 0'1"' it tew thQusandthsLd an 1 inch, will-bespiced apart i fqua ter o rya wg I few hmdredths-bt an inch'ffor "pessi'bly eveh more --i-'n s me portions of the design."

these line's instead"of'heing heir1j11es"-'will;- v by; the procesgfbt enlstrgementp h aveattained J 7 i a tv'id'th ef'possibly 'a sixteenth pffen-inchorf I-Oim this enlargement a 'p'hotographie. negativeis macl'e; 'Whieh Wvmi"the 'e'ente-r otthe design What appearsin 4 the original "asa -deeptone," appears "in" the 'ph oft-0g!"a phie enlar ement as a raggedt irregular ebnglom'eration of linesi TheQ0p posite edges df eachline will also- 'eppear somewhat fmg'ged' Wand the lines 'm@y the broken in spots. These ill-1 pei feetione willap' ear in the reproduction iupon 'the-p'ldtes C', a'iid F," 1 While the-design flS xhttde from a eontin ueus line subject t0 the imperfections" above:-

succeeding-leaps l l he refierredto, and ref enenc'e- 1 will he? had =t0 71 01m 0f" these=.-' loops; it heiiig understeod*th'at the same practices;

otgtewter width than thelines a -c'; or"

theilines b ahd d, and the lines 72" and d 0f greater width them the l-i-I-ies a' andi 0 the f"Sii1ce\the 'iifi 'entioh relates only "to "the production of the printing plates; r'e 'r i dile'tion efthe print firdiflerenttcdldrs iis meins off a: hl li'eh *imdfin a; co ler which will" difiei'ent edlei'; Theinerease-in the lEine-i 51 may he r'egu'lar wunfiormmfima befi I regular" 01* graduatehas deemed. I The-lme- 'nhe pme I) is then' remedled*in eelmiened', or both, as desired, the lines a-ec-a, c.c. and-d,d beingideletedm;

manner as; to the lines 0-0", and the lines photographically, I, all ofg, the lines upon, the; printing-plates, G, H, I and vJ will be sharp v solid and clearly defined, there .being no a-a', b-..b and cZ.- cZ ,-.deleted. p The same. process; is then followed with the ,plate F, the lines d-d yet the loops of g each group being. retained. and the lines 3 1 son of the variousiphotographic steps there-2 7 when this work is a completed, a ill b. observed that a co osite re-production I of the four plates C, D, E and F will, consist of the originaldesignshown .upon the enlargement B with. certain selected lines widened and all. lines sharplyfldefined soasj to ensureperfect, clearcut, continuous lines in the printing plate subsequently made from these plates.v I

The ;-deeper toned portion of the design indicated at 6, Figs. 1 and 2 ofthefdrawings, 1 preclude any substantial modifications of the lines, as such, in this portionof the.

design. It is possible, however, by theuse of a brush and white or black-inks todelete some portion of the design and to strengthen other portions thereof so that vthe original character of the machine-made? designas toithis portion thereofmaybe so modified, as to make it readily distinguishable from designs produced by means: of the rose englue or pantograph. ,v-Also by use of the brush and black 'or' White inks, arr-arbitrary figure f appearing in color or as a black, may be incorporated inthe design orif desired-a portion ofsu'ch figure may be incorporated in oneplat'e and other portions as f" thereof in other plates. v

It will be readily understoodvthat there are practically no limitations uponyariations in thegcharacter of the designs used upon these plates, sincethegeneral character-of the design may be varied infinitely by changing ,the adjustments of the rose ,engine or. pantograph,r and this design may be;

modified as desiredein-nthe manner above 1 "of arbitrary figures maybe introduced in the bodyof the, design in any, or all of the plates, and that any; number ofcolors in any: varied relation maybe used-in connec-' tion with thecompleted; safety tintdesign reproducedcfrom the master. printing plates.

, After the plates C, D,,E andF/are completed,'-a photographic reproduction thereof upon any desired reducedscalezis, made of eachof said plates, great care being required to secure a proper placing ofithe designs upon-,the photographicplates. When each plate is developed, the operator has negativeswhich maybe used in making the master plates Gr, H,.I and .J corresponding respectivelywith the metal plates 0, D, E

plates made made negative r and F, but upon; a much,reduced scale g' v v I I v By reason of the sharpness-and clear definit The plate E is -then modified in the same loss in definition. during the p-rocessby. ,1.ea-

in. ,In fact .the' definitioni of,.these-master printing plates will be .veryflmuch better.

than in the ordinary photo engraved master; l directly from the machine to make ordinariytransfersas used in piano- The plates G, 90.

graphic printing, suchtransfers being used 7 to build up a completed. designsuitable for, a partieularnote or negotiable instrument, a The methods employed in making I the, final.

printing plates are oldand well knownin theart. of lithography; 7 Each fentire plate G, H, I'and J U'may be transferred to the final printing ifit jbeIdesired to in corporate a medallion design in the a safety;,i' v

tint. v-

Ifit be dQShedQiinSaadtihardening the design upon theplate four timesto secure i the plates C, D, E and F, it is apparentithat it-maybe produced twice and each of the reproductions,cut inhalf so that the effects of four distinct color plates may. be secured from but, two reproductions of the design With atenfold or greater 'enlargement" of the original design, any slight Variation infl ovQ the, lines. will not be apparent in the final reduced reproduction, so ,thatthe'platesmay be readily cut, any f's'light condensing fof theQ design due-tothe'loss of metal at; the cutm being so small as, to have absolutely'no "dc- 1 tectable effect in the, "finished print.

while I have described the invention waa relation to the production of four platesffor multicolor Work'withf'the arrangement ofthe linesin four groups, succeeding lines in each group being upon different plates, itis apparent thatthe same method may be employedzin the production of sets ofpla'tes of any desiredxnurnber and any desiredgroup ing of the'lines, maybe fol-lowed. For in'-.

stance, any number of. adjacent lines may be included in one plate so longas the lines deleted fromthedesign upon. this plate, are" included in another or other plates sojasto reproduce a completed design. Further' more, the lines, in eachplate may belinade continuous. or may be brokenat the inter section of the lines ther'eon with'linesupoir; other plates. In' the former instance, in the final imprint lines; of one color will overk lay thoseof another, and'difiioulties of registration of; different plates, will be very" 7 much reduced.

Also if desired portions of insiha rbe blocked w was fie We eriu teda nges 139 at certainpoints in the completed design for purposes of providingvgmeans. whereby a counterfeit may be distinguished from a genuine note or negotiable instrument. In fact, the manual'modification-of certain selected lines as tothe Width or breadth thereof and the selected deletion of lines or portions of lines in one plate and the inclu sion of lines or portions of. lines in other plates, permits the employment of the same colors in i any portion of the. imprint and permits different colors toappear in close juxtaposition to-each other so as to place the color scheme of the safety tint Within the control of the plates, since this Wide distribution of colors maybe secured if an ink of one color'only is employed with relation to each plate.f The difiiculties of reproduc-.

tion of a safety tint design made Withplates produced bythe method orfart of my invention, Will'be more fully appreciated-When it isunderstood that any desired number of colors may be used upon any single plate so that throughout the complete'design correspondi'nglines may appear in a large variety. of .colors, and even with chromatic effects. a

The measure of safety secured byetints made from plates produced in accordance with my. inventionis increased manifold, due, in part, to the impossibility of mechanically reproducing the geometrical line de sign forming the -tint,and in. part to the -mechanical difficulties of making plates in accordance with the invention, Since such requires highly developed skillin the use of therose engine orgpantograph, inthe art of photography, in. the use of thabrush, in photo-engraving, and inmaking the imprint, arts so widely. divergent as to make counterfeiting extremely diflicult, if not impossible. a v I 1 It is not my intention to limit the invention to the production of 'sets' of plates of any definite number, nor to any limitation as to the selected linesmodified or deleted in any plate, and"reta1ned in any other plates. Instead of-makingthe enlargement B bythe method usually-employed in solar or bromide printing, an ordinaryv camera enlargementmay be made. a a i v .The method or art of my invention. does not utilize anyof the methods or practices usually employed in making plates for multicolor Work, no color filter screen and no halfsign.

distinguishable ,from, the a mechanically. jproduced lines, photographically reducing the modifieddesign, and making a photo engrav ing ofthe reduced design.

2. The methodor art of making printing safety tints consisting in mecha'nically creating a line geometricaldesign,=photographica-lly enlarging said design', ,modify-' ing the characteristics of someflines; in said design, whereby suchlines 4 are readily dis-- 7 tinguishable from the mechanically produced tions in otherlines-therein, photographically photo-engraving of the reduced. desigrrf '3. The'method 'orart of-making plates for printingsafety tints consisting? inimechan- Ilines, strengthening and removing impcrfecreducing the-modified design, and making'a ically creating a "line-1 geometrical: :design,

photographically enlarging'saiddesign, mod- .ifyingthe characteristics of some lines fin said design, "whereby such lines: are readily distinguishable from the mechanically; produced lines, deleting a portion of-thej design Where numbers of lines :cross and ire-cross each other; in close juxtaposition, photographically reducing the modified design, and making a photo-engraving of the reduced de' 4. The method or art of-makingplatesfor printing safety tints consistingin mechanically creating a line, geometrical design,

photographically enlarging said design, mod-- ifying the characteristics ,of some lines. in

said design, whereby such lines are readily distinguishable from themechanicall 1 0- duced lines,deleting a portion of. the design where numbers of lines cross ELIIdJI'GeOlOSS each other in close juxtaposition, substituting an arbitrary design in lieu ofthe deleted portion, photographically'reducing the modifieddesign, and making a of the reduced design. "I

photo-engrav ng ofniakingplates for i Ilhe method'orart printing safety tintsconsisting in mechanically creating av line geometrical 1 design,

photographically enlarging Isa-id design,

modifying the characteristics, of -.,some

lines in said design, wherebyisu'ch lines are readily distinguishable from- 1 the me"- chanlcally produced lines, 1 strengthening and removing imperfectio-nsinother lines,

therein, deleting a portion-of the nd'esign Where numbers'oflines cross andflre cross each other: in close juxtaposition, photo'- graphi'cally reducing the modified design,

and making a photo-engraving offlthe-rdduced designs 3 4,". Y

6. The method or art of making plates for printing safety tints consisting in mechanically creatingga line geometrical design, photographically 'ienlarging said design, modifying-the characteristicsof: some lines] in said design, whereby such lines arejread ily distinguishable from the; mechanically p'ro duced lines, strengthening and removing im tographically enlarging said design, modifying the characteristics of some lines in said design, whereby such linesare readily distinguishable from the mechanically produced lines, incorporating an arbitrary figure amongst said lines, photographically reducing the modified design, and making a photoengraving of the reduced design.

p 8. The method or art of making plates for printing safety tints consisting in mechanically creating a line geometrical design, photographically enlarging said design, whereby a positive reproduction of the design is secured, making a plurality of photographic reproductions of said design upon rigid plates, deleting or blocking out arbitrarily selected adjacent lines in each of said plates, the lines removed in one plate being retained in another plate, photographically reducing the modified-design upon each plate and making a photo-engraved plate from each of said reduced designs, whereby in the use of said last named plates, closely juxtaposed lines of different colors may be produced in the imprint.

9. The method or art of making plates for printing safety tints consisting in mechanically creating a linegeometrical design, photographically enlarging said design, whereby a positive reproduction of the design is secured, making a plurality of photographic reproductions of said design upon rigid plates, deleting or blocking out arbitrarily selected adjacent lines in each of said plates, the lines removed in one plate being retained in another plate, modifying the width of'some of the lines in the designs upon said plates, photographically reducing the modified design upon each plate and making a photo-engraved plate from each of said reduced designs, whereby in the use of said last named plates, closely juxtaposed lines of different colors may be produced in the imprint.

10. The method or art of making plates for printing safety tints consisting in mechanically creating a line geometrical design, photographically enlarging said design, whereby a positive reproduction of the design is secured, making a plurality of photographic reproductions of said design upon rigid plates, deleting or blocking out arbitrarily selected adjacent lines in each of said plates, the lines removed in one plate being retained in another plate, strengthening and removing imperfections in lines in said plates, photographically reducing the modified design upon each plate and making a photo-engraved plate from each of said reduced designs, whereby in the use of said last named plates, closely juxtaposed lines of different colors may be produced'in the imprint. 11. The methodor art of making plates for printing safety tints'consisting in mechanically creating a line geometrical design, photographically enlarging said design, whereby a positive reproduction" of the design is secured, making a plurality of photographic reproductions of saidfdesign upon rigid plates, deleting or blocking out arbitrarily selected adjacent lines in each of said plates, the linesremoved in one plate being retained in another plate, modifying the width of some of the-lines in the designs upon said plates, strengthening and removing imperfections in other lines therein, photographically reducing the modified design upon eachplate and making a photo-engraved plate from each of said reduced designs, whereby in the use of said last named plates, ilosely juxtaposed lines of diiferent colors may be produced in the .imprint.

12. The method v or art of making plates for printing safety tints consisting in mechanically creating a line geometrical design, photographically enlarging said design, whereby a positive reproduction of the design is secured, making a plurality of photographic reproductions of said design upon. rigid. plates, deleting or blocking out arbitrarily selected adjacent lines in each of said plates, the'lines removed in one plate being retained inanother plate, deleting a' portion of the design upon each-of said plates, where a number of lines cross and re-cross each other in close juxtaposition, photographically reducing the modified design upon each plate and making a photo-engraved plate from each of said reduced designs, whereby in the use of said last named plates, closely juxtaposed lines of difierent colors may be produced'in the imprint.

13. The method' or art of making plates a portion of, the design upon.

ins-i806 bitrafy "design urinal iof' the' deleted portion, photographically reducing the modified design upon each whereby in the {use oi said -elosely j uxtaposed dines oi diflferent colors may be produced in the pr'intzm a l lIThe method or art of making plates for printing safety tints consisting 'in mechanically creating' *line fgeometrical de- 51 n, sign, whereby a positive reproduction of the design is secured, making a plurality sign upon rigid plates, deleting or blocking out arbitrarily selected adjacent lines in each of said plates, the lines removed in onev plate being retained in another plate, incorporating an arbitrary figure amongst said lines in one of said plates, photographically reducing the modified design upon each plate and" making a photoengraved plate from each of said reduced designs, whereby in the use of said last named plates, closely juxtaposed lines of different colors may be produced in the imprint.

15. The method or art of making plates for printing safety tints consisting in mechanically creating a line geometrical design, photograpliically enlarging said design, whereby design is secured, making a plurality of photographic reproductions of said design upon rigid plates,

"trarily selected adjacent lines in each of said plates, the l nes removed in one plate being retained in another plate, deleting a portion of the design upon each, of said plates, where a number of lines cross and re-cross each other in close juxtaposition, substituting an arbitrary design in lieu of the deleted portion, incorporating an arbitrary figure amongst said lines'in one of said plates, photographically reducing the modified design upon'eacli plate and making a photo-engraved plate 'from each of said reduced designs, whereby in the use of said last named plates, closely juxtaposed lines of different colors may be produced in the imprint. v

16'. The method or art of making plates for rinting safety tints consisting in mechanically creating a line geometrical design, photographically enlarging said design, whereby apositive reproduction of the design is secured, making a plurality of photographic reproductions of said design upon ri id plates, deleting or blocking out arbitrarily selected adjacent lines in each of said plates, the lines removed in one plate being retained in another plate, modifying.

S The method- 'or art 50- v for printin safety tints c risisting in me- I photographically"enlarging said dechan'ically creating 1 a line- "geoinetrical :"de-

a positive reproduction ofthe deleting or blocking outarbi-.

' the'design upon each "of' 'said p1ates,:where-'a number of lines' cross" andiracross; each. other plate and" making aphoto engraved plate irom each of said reduced designs, last named plates,

in close juxtaposition, hotogra hically reduced inthe imprint: 1

iiiak-ing 51a,-

sign, photographically enlarging said design, whereby a positive reproduction of of photographic reproductions of said dethe design is secured, making a plurality of photographic reproductions of said sign upon rigid plates, deleting or blocking out arbitrarily selected adjacent lines in each of'said plates, the lines removed in one a plate being retained in another plate, modifying the width of some of the lines in the designs upon said plates, deleting a portion of the design upon eachof sa-idplates, where a number of" lines cross and re-crosseach other in close juxtaposition, substituting an arbitrary design in lieu of the deleted portion, photographically reducing the modie fied design upon each plate and making a photo-engraved platefromeach' of said reduceddesigns, whereby in the use of said last named plates, closely juxtaposed lines of.

different colors may be produced in the' imprint.

18. The method or art of'makingplates 0 for printing safety tints consisting n me-.

chanically creating a line geometrical design, photographically enlarging said design, wherebya positive reproduction ofthe design is secured, making a plurality of I photographic reproductions of said design upon rigid plates, deleting or blocking out arbitrarily selected adjacent lines in eachof i sa d plates, the lines removed in one plate being retained in another plate, modifying the Width of some of the linesin the. designs upon said plates, incorporating an arbitrary figure amongst said lines in one of said plates, photographically reducing the modified design upon each plate and making a: photo-engraved plate from each of said re-r duced designs, whereby in the use of said last named plates, closely juxtaposed lines of different colors may be produced in the imprint. i

19. The method or art of'making plates chanically creating a line geometrical design, photographically enlarging said design, whereby a positive reproduction of the design is secured, making a plurality "of photographic reproductions of said design upon rigid plates, deleting or blocking out arbitrarily selected adjacent lines in, each ofsaid plates, the lines removed in one plate being retained in another plate, modifying 120' 1 for printing safety tints c'onsisting'in methewidth of some of thelines in the designs upon said'plates, deleting a portion of the design upon each ofsaid plates, Where a number of lines cross and re-cross each other in close juxtaposition,substituting an arbitrary design in lieu of the deleted portion, incorporating an arbitrary figure amongst said lines in one of said plates, photographically reducing sign uponeach plate and making a photoengraved plate from each of said reduced designs, whereby in the, use of said last named the modified dea print. 1

DANIEL E. W'itnesses ALFRED S. MAJOR,

oonHULL.

plates, closely juxtaposed lines of different colors may be produced in vv he-im- 

